diff --git a/contrib/Makefile.am b/contrib/Makefile.am
index 45a9510..b62ea14 100644
--- a/contrib/Makefile.am
+++ b/contrib/Makefile.am
@@ -1,4 +1,4 @@
-DEFINES = -I ..
+AM_CFLAGS = -I ..
 LDADD = ../libvncserver/libvncserver.a @WSOCKLIB@
 
 noinst_PROGRAMS=zippy
diff --git a/x11vnc/Makefile.am b/x11vnc/Makefile.am
index b601725..5deccea 100644
--- a/x11vnc/Makefile.am
+++ b/x11vnc/Makefile.am
@@ -1,4 +1,4 @@
-DEFINES = -I ..
+AM_CFLAGS = -I ..
 LDADD = ../libvncserver/libvncserver.a @WSOCKLIB@
 
 SUBDIRS = misc